Chemical Composition (%)
| Sb | 7.0~8.0 |
|---|---|
| Cu | 3.0~4.0 |
| Sn | Balance |
Mechanical & Physical Properties
| Hardness | ≈24 HBW |
|---|---|
| Density | ≈7.3 g/cm³ |
| Max service temperature | <100 ℃ |
Typical Applications
Grade Overview
A tin-based Babbitt with a little less antimony than the 11-6 grade, used for large-machine bearings, bimetal bearings, automotive engine bearing shells and bushes. Lowering the antimony improves toughness, with strength and hardness slightly reduced - hardness is about 24 HBW - while anti-friction behaviour is close to that of ZSnSb11Cu6; working temperature is generally kept below 100 °C, which suits it to pouring thin-walled bimetal bearings. Load capacity is a little below the 11-6 grade and high-temperature performance is likewise limited. Use it for bearing linings and thin-wall shells in large equipment; control alloy composition and cooling rate during pouring to secure bond strength with the steel backing, and limit working temperature and load in the design. It is a common choice for general-purpose shells in large machines because the lower antimony level tolerates a little more distortion and shock; the lining is normally bonded to a bronze or steel shell, and the fit and clearance should be set so the oil film can carry the load.
Data compiled from current standards; for selection reference only. Ordering is subject to the standard and the mill certificate.